After two weeks after intercourse during ovulation, you can use a morning pregnancy test. Since morning urine is more concentrated and contains a higher concentration of HCG, it is recommended to take morning urine for testing for higher accuracy. When using the test, you should strictly follow the instructions, i.e. stick the suction hole into the urine collection cup for 10 seconds and then take it out, or use a dropper to absorb about 4 drops of urine sample and add it to the test card sample area. The result can be observed within 1-5 minutes in general, but should not exceed 5 minutes. If the test strip shows two red lines, i.e. both the test line and the control line are red bars, the test is positive and the pregnancy accuracy rate is about 85%-95%. If only the control line is a red bar and the test line has no color change, the test is negative and you may not be pregnant. HCG is secreted by the placenta and is distributed throughout the body with the blood, so the early pregnancy test can be used to determine the level of HCG by testing the urine. However, early pregnancy test strips are not 100% accurate and may show false positive or false negative results due to diseases as well as medications. It is recommended that women try to go to the hospital for a blood draw and ultrasound test, which will not only determine the week of pregnancy, but also determine if the pregnancy is ectopic.